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        <h2>
          <span class="refentrytitle">wgbowedbar</span>
        </h2>
        <p>wgbowedbar — 
      A physical model of a bowed bar.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp167754624"></a>
        <h2>Description</h2>
        <p>
      A physical model of a bowed bar, belonging to the Perry Cook family of waveguide instruments.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp167755904"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>wgbowedbar</strong></span> kamp, kfreq, kpos, kbowpres, kgain [, iconst] [, itvel] \
      [, ibowpos] [, ilow]</pre>
      </div>
      <div class="refsect1">
        <a id="idp167758144"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>iconst</em></span> (optional, default=0) -- an integration constant. Default is zero.
    </p>
        <p>
      <span class="emphasis"><em>itvel</em></span> (optional, default=0) -- either 0 or 1. When <span class="emphasis"><em>itvel</em></span> = 0, the bow velocity follows an ADSR style trajectory. When <span class="emphasis"><em>itvel</em></span> = 1, the value of the bow velocity decays in an exponentially.
    </p>
        <p>
      <span class="emphasis"><em>ibowpos</em></span> (optional, default=0) -- the position on the bow, which affects the bow velocity trajectory.
    </p>
        <p>
      <span class="emphasis"><em>ilow</em></span> (optional, default=0) -- lowest frequency required
    </p>
      </div>
      <div class="refsect1">
        <a id="idp167763408"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>kamp</em></span> -- amplitude of signal
    </p>
        <p>
      <span class="emphasis"><em>kfreq</em></span> -- frequency of signal
    </p>
        <p>
      <span class="emphasis"><em>kpos</em></span> -- position of the bow on the bar, in the range 0 to 1
    </p>
        <p>
      <span class="emphasis"><em>kbowpres</em></span> -- pressure of the bow (as in <span class="emphasis"><em>wgbowed</em></span>)
    </p>
        <p>
      <span class="emphasis"><em>kgain</em></span> -- gain of filter. A value of about 0.809 is suggested.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp167768960"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the wgbowedbar opcode. It uses the file <a class="ulink" href="examples/wgbowedbar.csd" target="_top"><em class="citetitle">wgbowedbar.csd</em></a>.

      </p>
        <div class="example">
          <a id="idp167770816"></a>
          <p class="title">
            <strong>Example 1039. Example of the wgbowedbar opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac     <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o wgbowedbar.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1

<span class="oblock">instr</span> 1

kp   <span class="op">=</span> p6
asig <span class="opc">wgbowedbar</span> p4, <span class="opc">cpspch</span>(p5), 1, kp, 0.995
     <span class="opc">outs</span> asig, asig

<span class="oblock">endin</span>
<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="stamnt">s</span>
<span class="stamnt">i</span>1 0 .5 .5 7.00 .1	<span class="comment">;short sound</span>
<span class="stamnt">i</span>1 + .  .3 8.00 .1
<span class="stamnt">i</span>1 + .  .5 9.00 .1
<span class="stamnt">s</span>
<span class="stamnt">i</span>1 0 .5 .5 7.00  1	<span class="comment">;longer sound</span>
<span class="stamnt">i</span>1 + .  .3 8.00  1
<span class="stamnt">i</span>1 + .  .5 9.00  1
 
<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp167775104"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: John ffitch (after Perry Cook)</td>
          </tr>
          <tr>
            <td>University of Bath, Codemist Ltd.</td>
          </tr>
          <tr>
            <td>Bath, UK</td>
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        <p>
    </p>
        <p>New in Csound version 4.07</p>
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